Nagaoka, south (Pliocene of Japan)

Where: Niigata, Japan (37.3° N, 138.8° E: paleocoordinates 37.9° N, 138.2° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Shiroiwa Formation, Late/Upper Pliocene (3.6 - 2.6 Ma)

• formation-level stratigraphic resolution

Environment/lithology: coastal; sandy siltstone

• sandy siltstone

Primary reference: M. Kato, I. Kabayashi, S. Kabayashi, I. Sasagawa, T. Shinmura, K. Tamura, H. Horikawa and M. Miyawaki. 2008. Discovery of the Hydrodamalinae (Sirenia, Mammalia) from the Late Pliocene Shiroiwa Formation in Nagaoka City, Niigata Prefecture. Bulletin of the Nagaoka Municipal Science Museum 43:1-20 [M. Uhen/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 89861: authorized by Mark Uhen, entered by Mark Uhen on 17.06.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Cerithioidea - Turritellidae
Turritella saishuensis turret shell
subspecies motizukii, subspecies saishuensis
 Sorbeoconcha - Naticidae
 Pseudomelanoidea - Pseudomelaniidae
Bivalvia
 Nuculanida - Yoldiidae
"Yoldia notabilis" = Yoldia (Cnesterium) notabilis
"Yoldia notabilis" = Yoldia (Cnesterium) notabilis Yokoyama 1922 clam
 Nuculanida - Nuculanidae
Nuculana yokoyamai pointed nut clam
 Nuculida - Nuculidae
Acila insignis divaricate nutclam
 Thraciida - Myochamidae
 Pandorida - Pandoridae
 Cardiida - Tellinidae
Macoma praetexta tellin clam
 Pholadida - Myidae
"Mya japonica" = Mya (Arenomya) arenaria
"Mya japonica" = Mya (Arenomya) arenaria Linnaeus 1758 softshell clam
 Lucinida - Lucinidae
"Triodonta borealis" = Lucinoma (Lucinoma) borealis, "Lucinoma annulata" = Lucinoma annulatum
"Triodonta borealis" = Lucinoma (Lucinoma) borealis Linnaeus 1767 clam
"Lucinoma annulata" = Lucinoma annulatum Reeve 1850 clam
 Arcida - Glycymerididae
 Arcida - Arcidae
Anadara amicula ark
supspecies elongate
 Arcida - Cucullaeidae
"Arca boucardi" = Tetrarca boucardi
"Arca boucardi" = Tetrarca boucardi Jousseaume 1894 clam
 Pectinida - Pectinoidae
Mammalia
 Sirenia - Dugongidae
Hydrodamalis sp. Retzius 1794 Steller's sea cow